Improvement in blow-offs for boilers



E. F. HUSTED.

Improvement in Blow-Offs for Boilers. N0. 131,219. l v Patented Sep. I0,1872.

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UNITED STATES PATENT QFEI'CE.

ESBON F. EUSTED,A OF HARRISBURG, TEXAS.

IMPROVEMENT IN BLCW-OFFS FOR BOILERS.

Specification forming part of Letters Patent No. 131,219, datedSeptember 1Q, 1872.

Specification describing a new and useful Improvement in SurfaceBlow-Off Device, invented by ESBON F. HUSTED, of Harrisburg, in thecounty of Harris and State of Texas.

In some sections of country the water which it is necessary to use inlocomotive a-nd other steam boilers is so impure that it is with extremedifficulty that they are kept in a suitable condition for the generationof steam. This cannot be done except by frequent blowing oft', andconsequently a great waste of water, which is a very seriousinconvenience, especially in locomotives where the supply of water islimitedor the water-stations far apart. My object, therefore, is toprovide means for cleaning the boiler with as little waste of water aspossible. It is well known that alarge portion of the inorganic as wellas all of the organic impurities contained in the water are thrown tothesurface during ebullition, and that to cleanse the water, as well as toprevent sedimentary deposit, the blowin g-off apparatus should belocated at the surface of the water. My invention, therefore, consistsin a central box or vortex having one or more tubular perforated armsradiating horizontally therefrom secured in the boiler in any manner ator about at the water-line, said box having a pipe for the discharge ofthe gathered impurities or scum, the construction and arrangement beingas hereinafter more fully described.

In `the accompanying drawing, Figure 1 represents a vertical section ofmy device taken on the line a' a.' of Fig. 2. Fig. 2 is a horizontalsection taken on the line y y of Fig. l.

Similar letters of reference indicate corresponding parts.

A is the central box or vortex. B represents the tubular perforatedarms, one or more in number, communicating with the box, as seen in thedrawing. C is the discharge-pipe, which passes through the shell of theboiler. This pipe may pass through and discharge the scum from any partof the boiler. In the drawing it is represented as passing upwardthrough the top. It is provided with a cock suitable for the purpose.The arms B, one or more, are tubes perforated on one or both sides. Theouter ends of the tubes may be closed, except a small central hole, D,as seen in the drawing. The perforations E may be of any size, but arepreferably arranged4 so that the scum on the surface of the water willbe drawn from the extremities to the central box or vortex A. In thisexample of my invention I increase the size of the holes and diminishtheir distance apart from the central box outward and arrange the holesobliquely with each other in the opposite sides of the tube, as seen inthe drawing; but I do not confine myself to this particular arrangement.The box A is attached and made stationary by means of the ears F andscrew G to a stay-bolt, or by any other suitable means.

By opening the stop-cock in the dischargepipe under a presure of steamthe scum on the surface of the water will by this apparatus be drawn tothe box or vortex and discharged with but little loss of water, thusallowing the blowing ofi' to be frequently repeated and the boiler to bekept clean. In practice I attach four of the perforated arms B to thecentral box, the said arms extending in each direction at right angleswith each other at the surface of the water, vthus drawing to the centerthe scum from every part of the surface, but variations may be made inthe arrangement with` out departing from my invention.

Having thus described my invention, I claim as new and desire to secureby Letters Patent- A surface blow-off for locomotive-boilers, suspendedover the crown-sheet, with pipes B E projecting in different directionsand having perforations closer together at the ends than toward thevortex A, as and for lthe purpose described.

' ESBON FORREST HUSTED.

Witnesses:

CHARLES M. MULLIGAN, HARLEY W. PIERsoN.

